Water recirculating system for swimming pools



March 28, 1950 E. w. LANDON ET AL WATER RECIRCULATING SYSTEM FOR SWIMMING POOLS 3 Sheets-Sheet 1 Filed NOV. 2l, 1947 Inventors Dov/'d K Cave/10h March 28, 1950 Filed Nov.

E.`w. LANDON ET AL 2,502,052

WATER RECIRCULATING SYSTEM FOR SWIMMING POOLS 3 Sheets-Sheet 2 I 11 veu tor;

Everett W. Landon :26 David K. Cavenah WWW March 28, 1950 E. w. LANDON ET A1.

WATER RECIRCULATING SYSTEM FOR SWIMMING FOOLS 3 Sheets-Sheet 5 Filed NOV. 21, 1947 Inventors Evere/f W. Landon Dov/'d K. Cavenah Bf @Mm ana/Wawy 5mm Patented Mar. 28, QS

WATER*REcnuzULAcrING SYSTEM rolt sWmMiuG rooLs Everett WLMI/nden, ,San Mateo, :andkDavid Ki Cavenah, NorthiHollywood, Calif., :assignors to Landon .Standard Pools, Burlingame, Calif.

Application November 21, 1947, Serial No. l787,350 ,2 claims. (o1. 2104-11) This invention .relates to vnew and useful improvements and structural Areinements in `swimmingpoolsand the principal objectof the .invention is lto provide .aswimming pool `einiippeduwitn what may Joe called a water` recirculating` system which vwill `facilitate repeated use .of 'the water in the poolrwith afminimum amounto'f wasteand which, at Ithe same time, will skim `foreign matter from the water so :that .thewateriremains in a sanitary condition for bathing for considerable periods of time. l

A `further object jof the invention is to provide a vrecirculating system :forlswimming pools which also includes a chemical i'lltering funit and which, by virtue/of this and above ydescribed characteristcs, Will-enable the pool to remain in a thor oughly sanitary rcondition for -a fperiod of three or four weeks, without attention `suchas draining or skimming at frequent intervals which -is Anecessary in pools of "conventional types.

Another object ofthe invention `viste providea water 'recirculating Asystem lfor swimming pools which also `Vincludes means for maintaining the water in the pool at v'a constant, predetermined level.

An additional object fof 'the `invention "to provide 4a 'recirculating system of the character described which Vis simple Ain construction, which may be "easily installed, and-which, as aforesaid, will 'function for 4considerable `periods @of time without attention.

A still `further .object of the invention isto provide a recirculating system which, however, may be quickly and easily inspected or cleaned, when this form of servicing occasionally becomes necessary.

With the above more important objects 1in View, and such other objects as may become apparent as this speciication proceeds, the invention consists essentially ofthe 'arrangementrand construction of'parts asillustratecin the accompanying drawings, in which:

VFigure f1 is a top plan viewof a swimming pool constructed vrin accordance with the teachings of the invention ,Figure 2 Vis a cross sectional view, takensubstantially in the plane of the'line 2--2 in Figure 1;

Figure 3 is a top plan view of an overow tank and connections used in the invention;

Figure 4 is an elevational view, taken in the direction of the arrow 4 in Figure 3; and

`Figure 5 is a combined cross sectional view,

taken substantially in the plane of the line 5--5 55 in Figure` l andan elevational .view Lof fa Vfiltering unit 4used in the invention.

Like characters vof :reference `are `employed .to designate like parts in the specication ,and throughout the several views.

.Referring now to the accompanying `drawings in detail, the invention is .adapted Vfor use in as` sociation with a swimming pool .1.0 ,of suitable design, the same including `perimetric Walls .I .I and a sloping bottom .1.2, as Willbe clearly .understood.

The ybottom 412 is provided with the usualdrain i3 :which `communicates with .a pipe i4, herein after referred '-to.

The pool is `equipped in the .perimetric walls H thereof ywitha .plurality of water inlets I5,- hereinafter more fullydescribed, and also with ra water voutlet .I 6.v

The outlet I6 assumes the form of a Vtube Il embedded in the wall `.l I and formed witha :longitudinallyextending slot i8, this slot communieating with the pool through the medium :of an elongated .opening .I9 formed inthe pool walls. Needless to say, the water in the pool is maintained at a predetermined, normal level 29, andy it should be observed that the opening l 8 andthe tubes I5 are disposed `substantially rat this level, asis .best shown vin Figure 5.

An overiiow tank 2l :is provided 'below the ground level 22, this .tank comprising a suitablev receptacle formed with an extension neck '23, the :upper surface of which yis iiush With the ground level and fis'equipped with a hand-holef cover 24 whereby access may be had to the tank for :purposes of inspection or cleaning.

A balie plate ,25, formed with a plurality of openings 126, is positioned inthe tank'Zl which is separated thereby into a suction chamberZl and' an equalizing chamber 28, the bafe plate "25 being vertically disposed, as will be clearly apparent from the accompanying Figure 5.

The aforementioned outlet tube Il' isconnected by'means of a pipe '2Q to the suction chamberv 27 --of the tank 121, while a conduit 3D connects intake of a suitable water pump 34, which is preferably mounted a convenient location below the ground level. A suitable strainer assembly 35 may be installed in the line 32 for obvious reasons, and the outlet of the pump 34 is connected by means of a delivery line 3G to a filtering unit 31 of conventional type. This unit includes the usual filtering tank 38, hypochlorinator 39, chlorine tank 40, etc., the entire ltering unit being, as aforesaid, of conventional type so that further description thereof at this point is deemed unnecessary.

The unit 31 also includes a Waste disposal line 4I and a ltered water delivery line 42, the latter communicating with the various water inlets I5, as is best shown in Figure 1.

These inlets, rather than simply entering the i pool at right angles to the inner surface or" the walls II, are angularly disposed, so to speak, so that the water discharged therefrom will be diverted in the direction of the arrows 43 and circulation, so to speak, of the water in the pool will be produced, as indicated at 44.

By virtue of this angular deflection of the inlets, two forms of water circulation will, in fact, be created, the primary circulation being that on the water level which provides a movement of leaves, lint, and other major foreign matter toward the perimetric walls II of the pool, and hence, into the overiiow tank 2 I.

A secondary circulation is also created, this taking place intermediate the depth of the pool and involving relatively smaller but heavier particles of foreign matter which absorb water and remain in suspension, so to speak, for some period of time, during which they become heavier and eventually settle o-n the floor or bottom of the pool as the secondary circulation takes place.

Water from the bottom of the pool is recirculated through the pump 34 and lter unit 31 through the pipe I4 which communicates by means of a T-coupling I4 with the suction line 32. When so desired, the pool may be emptied through the drain I3 by means of the pump 34, or alternatively, a direct outlet may be associated with the drain I3. The overflow entering the tube I1 is delivered to the suction chamber 21 of the tank 2| by the sucking action of the pump 34 which tends to exhaust the contents of the suction chamber by delivering them to the filtering unit 31. By virtue of this sucking action of the pump, the level of water in the chamber 21 will be Anormally below the water level 20, and as a result, the water in the pool will tend to overilow into the chamber 21 under the inuence of gravity.: As will be clearly understood, after passing through the filtering unit 31, the filtered water is delivered through the lines 42 and inlets I5 to the swimming pool, as has already been explained.

The primary purpose of the conduit 3Il is to maintain the equalizing chamber 28 full of water, whereby the suction chamber 21 will be maintained in a similar condition by virtue of the openings 26. In this manner, the pump 34 will be prevented from sucking air when, for some reason, the overflow of water through the tubes I1, 29 is temporarily discontinued. lIf desired, the openings 26 may be temporarily blocked or stoppered by any suitable means, so as to regulate the flow of water from the chamber 28 to the chamber 21, depending upon the overflow of water through the tubes I1, 29.

The overflow tube 3l carries waste and automatically assures that the water level in the tank 2| and in the pool II] is maintained at the predetermined, normal level.

It is believed that the advantages and use of the invention will be clearly apparent from the foregoing disclosure, and accordingly, further description thereof at this point is deemed unnecessary.

Having described the invention, what is claimed as new is:

1. In combination with a swimming pool, a water recirculating system comprising a pump having an inlet and an outlet, a filter connected to the outlet of said pump, a coupling on the inlet of said pump, an eilluent conduit extending from the bottom of said pool to said coupling, an influent conduit extending from said lter and communicating with said pool, an equalizing tank, an overflow tube extending from said tank and communicating with said pool at a point spaced downwardly from the upper edge of the latter, and a suction pipe connecting said tank to said coupling.

2. In combination with a swimming pool, a water recirculating system comprising a pump having an inlet and an outlet, a lter connected to the outlet of said pump, a coupling on the inlet of said pump, an eiiiuent conduit extending from the bottom of said pool t0 said coupling, an influent conduit extending from said filter and communicating with said pool, an equalizing tank and a partition therein separating the same into juxtaposed overflow and suction chambers, an overflow tube extending from said suction chamber and communicating with said pool at a point spaced downwardly from the upper edge of the latter, a suction pipe connecting said suction chamber to said coupling, said partition being provided with an opening for controlling the rate of water flow from said equalizing chamber to said suction chamber, and an equalizing conduit extending from the equalizing chamber and communicating with said pool at a point substantially below said overflow tube.

EVERETT W. LANDON. DAVID K. CAVENAH.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,331,270 Lippincott Feb. 17, 1920 1,563,849 Hartman Dec. 1, 1925 1,670,094 Becker May 15, 1928 1,714,069 Becker May 21, 1929 1,800,378 Everson Apr. 14, 1931 2,057,208 Runcie Oct. 13, 1936 2,315,184 Boosey Mar. 30, 1943 

